The biggest event of the Esperanto calendar is taking place right now in Lisbon, the capital of Portugal. You'll know you're in the right place when you see the logo pinned up on a building:
Do you have any idea why the emblem is designed like that? It's because one of the outstanding features of Portuguese culture is ceramic tiling in a style called azulejo. Esperanto speakers in Lisbon will see the style dotted all over buildings, such as this one:
The tiles are also used to create murals and appear all over the city:
And tourists are offered fridge-magnet varieties by the armful:
So, it's no surprise that the organisers made their logo take the form of azulejo tiles. But why is there a green star there?
It's because the green star is the symbol of Esperanto! That's why we have one on the cover of the book!